All Stories by Stephen Ornes
- Brain
The weight of thought
Thinking heavy thoughts? Scientists have just put people on a balance and shown that the brain briefly gains blood — becoming a bit heavier — while concentrating.
- Animals
Dissecting the dog paddle
Scientists occasionally describe the dog paddle as a “trot,” but that’s not right. When dogs swim, their complicated leg motions look more like a frantic run.
- Space
Galaxies stash mass in clouds of gas
Astronomers may have finally figured out why predictions of the amount of matter in the universe don’t match observations. A huge amount may hide in the gas clouds that surround galaxies.
- Health & Medicine
Baseball: Keeping your head in the game
Head movements play an important role in successfully tracking lightning-fast incoming pitches.
- Space
Dusty remains from a dead star
A supernova first spotted in 1987 produced a huge cloud of space dust. Astronomers are now finding clues in it to how stars formed in the early universe.
- Animals
The bad-breath defense
The nicotine in tobacco that poisons some creatures can also act as a chemical defense — at least for some caterpillars. The bad breath it gives these insects repels natural predators, such as spiders.
- Brain
Erasing memories
Electroconvulsive therapy is used to treat severe depression, but the electrical jolt it sends into the brain also may erase bad memories.
- Chemistry
Salt bends the rules of chemistry
When squished between two diamonds and zapped by a laser, salt’s atoms can link up in unexpected ways.
- Health & Medicine
Doggy dust could be a good thing
The outdoor dust that dogs drag in contains a mix of microbes that helped mice fend off allergic reactions and viral infections.
- Genetics
Ancient DNA sparks new mystery
DNA from a 400,000-year-old leg bone found in Spain is by far the oldest recovered from pre-human ancestors. It also shows an unexpected link to later, Asian ‘kin.’
- Space
The sun’s giant heat elevators
Scientists have long known that plumes of hot plasma rise from the sun’s interior to its outer layers. New observations have now identified especially big plumes that can be 15 times as wide as Earth’s diameter and last for months.
- Animals
How seahorses use their heads
A dwarf seahorse’s head may look funny, but its shape allows the creature to sneak up on fast-moving prey.
